Admiral jimbob said:
They're not mandatory, you can just head straight to the teleporter in dragon form and drop onto it. You do have to be pretty quick/precise to get to it before being slaughtered by explosive arrows, but there are no hard barriers like those that forced you to crawl through the entire fortress before.
It counts as decline for me, a quick, dirty fix reeking of bethesda rather than trying to diversify the fortress experience and make it more interesting.
Old fortresses were better in that there was a point to crawling them and a point to all those defences and ground troops. Now, they are pretty much bypassable by allowing you to dragon-drop onto the teleporter.
Then again, I didn't find the fortresses terribly annoying. They were quite a bit monotonous, but they did have unique aesthetics and atmosphere in addition to being z-heavy environments. As a concept they were very cool, it's just that they failed to provide challenge other than "here are 238 identical ballistae, have fun destroying them one-by-one".
More diverse, synergistic fortifications and more diverse aerial defenders would help, same with some sort of XP alternative between dragon and human forms that would remove the need to quick-fix it by disabling ground troops while you're in the air.
For example, you could have ground-based crews that would rush and man the fortifications and machinery if you attacked in dragon form (also, destructible Black Ring airships *fapfapfap*), then get killed when you destroyed the defenses (no ground based XP), or attack you on foot if you attacked in human form, leaving the defences unamanned and non-functional (no XP for destroying them later in dragon form).
And kind of, you only go into dragon form for one longish sequence at the very end.
It's pretty cool, albeit linear.
You get supercharged skills, but the enemy numbers are quite insane and it is an escort mission so you can't really take your time.
You also get a new spell that pretty much works as mini-nuke.